Roast duck is one of dishes in Beijing.A. deliciousB. more deliciousC. most deliciousD. t

问题补充：

Roast duck is one of dishes in Beijing.

A. delicious

B. more delicious

C. most delicious

D. the most delicious

答案：

A. delicious

B. more delicious

C. most delicious

(答案→)D. the most delicious

解析：句意：在北京，烤鸭是最可口的菜肴之一。one of+形容词的最高级+可数名词的复数形式，故选D